Vent protector for air brake pressure retaining valves



E. A. FREY Sept. 30,1941.

VENT PROTECTOR FOR AIR BRAKE PRESSURE RETAINING VALVES Filed March 12, 1941 Patented Sept. 30, 1941 UNITED STATES PATENT OFFICE VENT PROTECTOR FOR AIR, BRAKE PRESSURE RETAINING VALVES 2 Claims.

The present invention relates to new and useful improvements in vent protectors for pressure retaining valves used on railway cars and has for its primary object to provide an attachment of this character for the exhaust port of a standard air pressure brake retaining valve which will effectively prevent the clogging of the exhaust port or vent by foreign substances or insect nests which it has been found frequently interfere with the proper functioning of the air brake system.

A further object is to provide a vent protector of this character of simple and practical construction, which is efiicient and reliable in performance, relatively inexpensive to manufacture and install in operative position and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming part hereof, wherein like numerals refer to like parts throughout, and in which- Figure 1 is a side elevational view of an air pressure retaining valve with parts broken away and shown in section to show the protector attached thereto,

Figure 2 is a fragmentary side elevational view,

Figure 3 is a plan view of the protector with the hinge cover plate removed, and

Figure 4 is a side elevational view of the protector showing the hinge in position thereon.

Referring now to the drawing in detail, the numeral 5 designates the standard air brake pressure retaining valve having the internally threaded exhaust port 6 projecting from one side thereof.

In order to prevent the entrance of foreign substances into the port and which might cause a clogging thereof, I provide a protector which comprises a tubular member 'I having a threaded end 8 adapted for threaded engagement in the threaded end of the exhaust port, the intermediate portion of the member being provided with a polygonal flange 9 for receiving a wrench or other tool for threading the member into position.

The exhaust port 6 normally extends downwardly in an inclined direction as shown to advantage in Figure 1 of the drawing and the outer end of the member I is curved so that the surface of the end of said member will occupy a position in a vertical plane and a jamb nut I0 is carried by the threaded end 8 of the memher for fastening against the end of the exhaust port by the threaded end 8 of the'member to secure the protector in the position as shown in Figure 1 of the drawing.

On the upper surface of the member I, adjacent its outer end, is formed a flat lug H through which a hinge pin I2 is inserted and swingably mounted on the hinge pin is a lid or cover l3 adapted to normally gravitate into position over the outer end of the member 1.

Accordingly, the cover I3 normally protects the interior of the member I as well as the exhaust port 6 from the entrance of foreign substances therein and at the same time permits the free escape of air from the valve during the operation of the brake system.

The outer face of the tubular member I is formed with a plurality of notches M which provide air vents for the discharge port 6 at all times, even when the lid I3 is closed and thus insure the escape of all air from the exhaust port.

It is believed the details of construction, advantages and manner of use of the device will be readily understood from the foregoing without further detailed explanation.

Having thus described the invention, what I claim is-- 1. A protector for the discharge port of air brake pressure retaining valves comprising a tubular member adapted for attaching to the discharge port and having the surface of its outer end disposed substantially in a vertical plane, a cover hingedly attached to the upper edge of said outer end of said tubular member and normally gravitating into closed position and vents formed in said tubular member having free communication with the interior thereof at all times.

2. A protector for the discharge port of an air brake pressure retaining valve and comprising a tubular member threaded in the discharge port, said tubular member having its surface at its outer end disposed substantially vertically, a cover hinged to the upper edge of said outer end of the member and arranged to normally gravitate into closed position and notches in the outer end of the member to provide atmospheric communication with the interior of the member when the cover is closed.

ELMER A. FREY. 

